【妙味课堂】JS热身课后习题

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js-dem-3</title>
<meta name="viewport" content="device-width">
<meta name="decription" content="a js test">
<style>
body {
background: #e9feff7a;
}
.set {
font-size: 18px;
margin-bottom: 10px;
}
.default {
width: 100px;
height: 100px;
border-style: solid;
background: #fff;
}
.set_btn {
background-color: red;
color:white;
}
.set_menu {
width: 270px;
height: auto;
margin: 80px 600px;
background-color: #c6c5c530;
display: none;
}
.small_bg {
width: 270px;
height: 38px;
margin-left: 13px;
}
p {
float: left;
margin-top: 10px;

}
.set_menu ul {
list-style-type: none;
}
.small_bg li {
float: left;
padding: 10px 8px;
}
input {
border: none;
vertical-align: middle;
}
input#red {
background: #d95d69;
color: white;
}
input#yellow {
background: #d7cc51;
color: white;
}
input#blue {
background: #4884dd;
color: white;
}
.num_btn {
border-style: groove;
}
.s_btn {
background-color: blue;
color: white;
margin-left: 15px;
}
</style>
</head>
<body id="all">
<div class="set">请为下面的Div设置样式
<input type="button" class="set_btn" id="set" value="设置"></div>
<div class="default" id="def"></div>
<div class="set_menu" id="menu">
<div class="small_bg">
<p>请选择背景颜色:</p>
<ul>
<li><input type="button" value="红" id="red"></li>
<li><input type="button" value="黄" id="yellow"></li>
<li><input type="button" value="蓝" id="blue"></li>
</ul>
</div>
<div class="small_bg">
<p>请选择宽(px):</p>
<ul>
<li><input type="button" class="num_btn" value="200" id="w2"></li>
<li><input type="button" class="num_btn" value="300" id="w3"></li>
<li><input type="button" class="num_btn" value="400" id="w4"></li>
</ul>
</div>
<div class="small_bg">
<p>请选择高(px):</p>
<ul>
<li><input type="button" class="num_btn" value="200" id="h2"></li>
<li><input type="button" class="num_btn" value="300" id="h3"></li>
<li><input type="button" class="num_btn" value="400" id="h4"></li>
</ul>
</div>
<div class="small_bg">
<ul>
<li><input class="s_btn" type="button" value="恢复" id="recover"></li>
<li><input class="s_btn" type="button" value="确定" id="ok"></li>
</ul>
</div>
</div>
</body>
<script>

window.onload = function(){
var oSetbtn = document.getElementById("set");
var oSetmenu = document.getElementById("menu");
var oDef = document.getElementById("def");
var oBackground = document.getElementById("all");
var oRed = document.getElementById("red");
var oYellow = document.getElementById("yellow");
var oBlue = document.getElementById("blue");
var oSetok = document.getElementById("ok");
var oRecover = document.getElementById("recover");
var oW2 = document.getElementById("w2");
var oW3 = document.getElementById("w3");
var oW4 = document.getElementById("w4");
var oH2 = document.getElementById("h2");
var oH3 = document.getElementById("h3");
var oH4 = document.getElementById("h4");

oSetbtn.onclick=function (){
oSetmenu.style.display = 'block';
oBackground.style.background = '#ebeabe4d';
}
oRed.onclick=function (){
oRed.style.background = 'red';
oDef.style.background = 'red';
oYellow.style.background = '#d7cc51';
oBlue.style.background = '#4884dd';
}
oYellow.onclick=function (){
oYellow.style.background = 'yellow';
oDef.style.background = 'yellow';
oRed.style.background = '#d95d69';
oBlue.style.background = '#4884dd';
}
oBlue.onclick=function (){
oBlue.style.background = 'blue';
oDef.style.background = 'blue';
oRed.style.background = '#d95d69';
oYellow.style.background = '#d7cc51';
}
oW2.onclick=function (){
oDef.style.width = '200px';
}
oW3.onclick=function (){
oDef.style.width = '300px';
}
oW4.onclick=function (){
oDef.style.width = '400px';
}
oH2.onclick=function (){
oDef.style.height = '200px';
}

oH3.onclick=function (){
oDef.style.height = '300px';
}
oH4.onclick=function (){
oDef.style.height = '400px';
}
oRecover.onclick=function(){
oDef.style.width = '100px';
oDef.style.height = '100px';
oDef.style.background = '#fff';
}
oSetok.onclick=function (){
oSetmenu.style.display = 'none';
}
}

</script>
</html>

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【妙味课堂】JS热身课后习题

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